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<h1 class="topictitle1">创建周期性备份</h1>
<div><p>将需要保护的资源关联到指定SLA策略，系统将对这些资源按照SLA策略进行保护。</p>
<div class="section"><h4 class="sectiontitle">操作步骤</h4><ol><li><span>选择<span class="uicontrol" id="ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001839142377_uicontrol3409635183613">“<span id="ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001839142377_text94091435113619">保护</span> &gt; 数据库 &gt; openGauss”</span>。</span></li><li><span>选择<span class="uicontrol">“<span>数据库</span>”</span>、<span class="uicontrol">“<span>实例</span>”</span>页签。</span></li><li><span>勾选需要保护的数据库或实例，单击<span class="uicontrol">“<span>保护</span>”</span>。</span><p><p>您也可以勾选多个数据库或实例进行批量保护。</p>
</p></li><li><span>选择SLA。</span><p><p>您也可以单击<span class="uicontrol">“<span>创建</span>”</span>，创建新的SLA。</p>
</p></li><li><span>配置数据库备份高级参数。</span><p><div class="p">相关参数说明如<a href="#ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001387428129_table354613271506">表1</a>所示。
<div class="tablenoborder"><a name="ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001387428129_table354613271506"></a><a name="zh-cn_topic_0000001387428129_table354613271506"></a><table cellpadding="4" cellspacing="0" summary="" id="ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001387428129_table354613271506" frame="border" border="1" rules="all"><caption><b>表1 </b>数据库备份高级参数说明</caption><colgroup><col style="width:22.11%"><col style="width:77.89%"></colgroup><thead align="left"><tr><th align="left" class="cellrowborder" valign="top" width="22.11%" id="mcps1.3.2.2.5.2.1.2.2.3.1.1"><p>参数</p>
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<th align="left" class="cellrowborder" valign="top" width="77.89%" id="mcps1.3.2.2.5.2.1.2.2.3.1.2"><p>说明</p>
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<tbody><tr><td class="cellrowborder" valign="top" width="22.11%" headers="mcps1.3.2.2.5.2.1.2.2.3.1.1 "><p>限速策略</p>
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<td class="cellrowborder" valign="top" width="77.89%" headers="mcps1.3.2.2.5.2.1.2.2.3.1.2 "><p>备份任务平均每秒最大传输的数据量。</p>
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<tr><td class="cellrowborder" valign="top" width="22.11%" headers="mcps1.3.2.2.5.2.1.2.2.3.1.1 "><p>并发数</p>
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<td class="cellrowborder" valign="top" width="77.89%" headers="mcps1.3.2.2.5.2.1.2.2.3.1.2 "><p>可同时执行备份任务的个数。</p>
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</tr>
<tr><td class="cellrowborder" valign="top" width="22.11%" headers="mcps1.3.2.2.5.2.1.2.2.3.1.1 "><p>优先使用备节点备份</p>
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<td class="cellrowborder" valign="top" width="77.89%" headers="mcps1.3.2.2.5.2.1.2.2.3.1.2 "><p><span style="color:#282B33;">该配置只针对实例的全量备份生效。</span></p>
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<tr><td class="cellrowborder" valign="top" width="22.11%" headers="mcps1.3.2.2.5.2.1.2.2.3.1.1 "><p>任务失败告警</p>
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<td class="cellrowborder" valign="top" width="77.89%" headers="mcps1.3.2.2.5.2.1.2.2.3.1.2 "><p><span style="color:#282B33;">任务失败后发送告警，下一次任务成功后告警自动清除。</span></p>
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<tr><td class="cellrowborder" valign="top" width="22.11%" headers="mcps1.3.2.2.5.2.1.2.2.3.1.1 "><p>源端重删</p>
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<td class="cellrowborder" valign="top" width="77.89%" headers="mcps1.3.2.2.5.2.1.2.2.3.1.2 "><p><span style="color:#282B33;">开启源端重删可以减少传输的数据量，但会增加客户端的资源占用。</span></p>
<div class="note"><span class="notetitle"> 说明： </span><div class="notebody"><ul id="ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001839143189_ul5885426132914"><li id="ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001839143189_li10885172616299">由于同一个代理主机只能和一个存储单元建链，如果开启源端重删，<span class="parmname" id="ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001839143189_parmname1288482662917">“指定目标位置”</span>请选择<span class="parmvalue" id="ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001839143189_parmvalue118843260299">“备份存储单元”</span>。否则，由于智能均衡可能会选择到未建链的存储单元，导致源端重删启用失败。如果不同受保护对象关联了不同SLA，且SLA中指定不同的备份存储单元，请为受保护对象选择不同代理主机，否则将会导致部分备份任务源端重删启用失败。</li><li id="ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001839143189_li9885182662911">如果代理主机已经与一个存储单元建链，当该代理主机未执行源端重删备份任务时，可以在代理主机上执行<strong id="ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001839143189_b9845163710167">dataturbo delete storage_object storage_name=</strong><em id="ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001839143189_i19447038131614">?</em>命令（命令中的<strong id="ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001839143189_b1050314315162">storage_name=</strong><em id="ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001839143189_i1237554410161">?</em>可以通过<strong id="ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001839143189_b11885726112912">dataturbo show storage_object</strong>命令查询），删除与存储单元的源端重删链接。再选择该代理主机执行源端重删备份任务，则可以成功与新的存储单元建链。</li><li id="ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001839143189_li11885142615297">请参考<a href="https://info.support.huawei.com/storage/comp/#/oceanprotect" target="_blank" rel="noopener noreferrer">兼容性查询工具</a>查看主机的操作系统类型是否支持源端重删，若不支持，配置源端重删后将不会生效。</li><li id="ZH-CN_TOPIC_0000001839189525__zh-cn_topic_0000001839143189_li7883549153219">若使用内置代理进行备份，配置源端重删后将不会生效。</li></ul>
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<tr><td class="cellrowborder" valign="top" width="22.11%" headers="mcps1.3.2.2.5.2.1.2.2.3.1.1 "><p>失败后自动重试</p>
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<td class="cellrowborder" valign="top" width="77.89%" headers="mcps1.3.2.2.5.2.1.2.2.3.1.2 "><p>开启后，任务失败后会按照设定的次数和时间自动重试任务。</p>
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</p></li><li><span>单击<span class="uicontrol">“确定”</span>。</span><p><p>如果当前系统时间已晚于该SLA首次备份的开始时间，则关联备份SLA后可以选择在当前立即执行备份或者根据SLA中设置的备份策略等待下次调度。</p>
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<div class="parentlink"><strong>父主题：</strong> <a href="zh-cn_topic_0000001792550136.html">步骤5：执行备份</a></div>
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